Using tablet technology and instructional videos to enhance preclinical dental laboratory learning.

The purpose of this pilot study was to examine if tablet technology with accompanying instructional videos enhanced the teaching and learning outcomes in a preclinical dental laboratory setting. Two procedures deemed most challenging in Operative Dentistry II were chosen for the development of instructional videos. A random sample of thirty students was chosen to participate in the pilot.

Microtensile dentin adhesive bond strength under different positive pulpal pressures.

Purpose: To measure the in vitro dentin microtensile bond strength of established adhesives under different hydrostatic pulpal pressures.

Methods: After IRB approval, 24 human extracted third molars were randomly distributed into four adhesive treatment groups: Clearfil-SE (self-etch, water-based), One-Step Plus (total-etch, acetone-based), Peak-SE (self-etch, ethanol-based) and PQ1 (total-etch, ethanol-based, Ultradent). Additionally each group was assigned to be restored under 0.

In vitro microtensile bond strength of four adhesives tested at the gingival and pulpal walls of Class II restorations.

Background: The authors compared the microtensile bond strength of teeth restored with four adhesives at the gingival and pulpal cavity walls of Class II resin-based composite restorations.

Methods: Five pairs of extracted third molars received two Class II preparations/restorations in each tooth. The authors randomly assigned each preparation to one of four adhesive groups: Adper Scotchbond Multipurpose Dental Adhesive (SBMP) (3M ESPE, St.

Adhesive analysis of voids in Class II composite resin restorations at the axial and gingival cavity walls restored under in vivo versus in vitro conditions.

Objectives: Adhesive analysis, under the scanning electron microscope of microtensile specimens that failed through the adhesive interface, was conducted to evaluate the amount of voids present at the axial versus gingival cavity walls of class II composite restorations restored under in vivo and in vitro conditions.

Methods: Five patients received class II resin composite restorations, under in vivo and in vitro conditions. A total of 14 premolar teeth yielded 59 (n=59) microtensile adhesive specimens that fractured through the adhesive interface.

An in-vitro microtensile test of Scotchbond Multi-Purpose adhesive applied at different priming times.

Adhesive bonding to dentin can fail if the dentin is too wet during application of the bonding resin. This study compared the in vitro 24-hour microtensile bond strength of teeth restored at four different priming times at the gingival cavity wall of Class II resin composite restorations. After IRB approval, six pairs of extracted third molars (yielding 12 teeth) received a proximal Class II prep/restoration in each tooth.

Support groups: why do people attend?

Support groups have become a part of the lives of many people who suffer from illness and injury. Physicians and other healthcare professionals often recommend them to patients and families dealing with medical conditions, and many support groups are diagnosis specific. The members of five support groups were surveyed to determine the factors that influenced their decision to participate.

In vivo versus in vitro microtensile bond strength of axial versus gingival cavity preparation walls in Class II resin-based composite restorations.

Background: Gingival margins in Class II composite restorations are a site of frequent failure. The purpose of the authors' study was to compare the microtensile dentin bond strength of gingival and axial restored cavity preparation walls of Class II composite restorations under in vivo and in vitro conditions.

Methods: After obtaining informed consent, the authors placed Class II resin-based composite restorations in 14 premolar teeth from five patients, under in vivo or in vitro conditions.

Shear-peel bond strength of orthodontic primers in wet conditions.

Objective: The purpose of this in vitro study was to determine whether a hydrophilic primer (Transbond MIP, [MIP]) produces a significant difference in shear/peel bond strength compared with a traditional hydrophobic primer (Transbond XT, [XT]) in wet (W) or dry (D) conditions and if there is a difference in the site of bond failure.

Design: A randomized blinded in vitro design.

Setting And Sample Population: The University of Missouri-Kansas City School of Dentistry.

The effects of different storage conditions on polyether and polyvinylsiloxane impressions.

While being shipped to a laboratory, impressions can be exposed to excessive temperatures. This study compared the effects of different time and temperature storage conditions, including temperature extremes of 66 C and -10 C, on the accuracy of addition silicone and polyether impressions. The greatest distortion generally occurred as a result of the 66 C temperature extreme.

Marginal ridge strength of Class II tunnel restorations.

Purpose: To test the strength, at the marginal ridge, of the tunnel preparation vs the Class II traditional box preparation when restored with composite or glass ionomer (GI).

Materials And Methods: Eighty-four extracted maxillary molars stored in normal saline and thymol were randomly divided into six groups of 14 each (determined by pilot study where alpha = 0.05, beta = 0.

Rehabilitation staff nurses' job satisfaction.

The issue of job satisfaction among rehabilitation nurses has not been addressed frequently in the literature. This qualitative study was designed to assess rehabilitation nurses' concerns and suggestions for improving the program in a 38-bed acute rehabilitation unit. The study's results indicate that the role of the rehabilitation nurse remains a rewarding one when communication with staff is high and the patient is the focus.

Accuracy of one-step versus two-step putty wash addition silicone impression technique.

This study compared the accuracy of one-step putty wash with two-step putty wash impression techniques. Five addition silicone impression materials-Mirror 3 (MR), Mirror 3 Extrude (ME), Express (E), Permagum (P), and Absolute(A)--were tested. A stainless steel model containing two full-crown abutment preparations was used as the positive control.

The effect of storage and thermocycling on the shear bond strength of three dentinal adhesives.

The purpose of this investigation was to evaluate the effects of time of storage and thermocycling on the shear bond strength of three dentinal adhesives. The shear bond strength of Mirage Bond was significantly greater than that of Scotchbond 2, which was significantly greater than that of Scotchbond Dual Cure (P less than or equal to .05).

An experimental evaluation of the effectiveness and efficiency of the leadup activity.

The positive effects of a leadup activity on the production of intracoronal operative preparations have been documented in earlier studies. However, an absence of certain controls may have jeopardized the validity of the earlier study, and an adequate test of the innovation's efficiency was not undertaken. The purpose of this investigation was to evaluate the effects of a leadup activity implemented as part of the scheduled laboratory course, when the amount of supervision provided to the experimental subjects during the entire course was reduced significantly, and when subjects were assigned randomly to the two conditions.

The effect of time on the adhesion of light-body to heavy-body Express in the two-step reline polyvinylsiloxane impression technique.

Often times light-body wash (LB) cannot be added to the heavy-body putty (HB) within 30 minutes when utilizing the two-step reline impression technique. The purpose of this study was to add the LB to the HB at times greater than 30 minutes and test the tensile bond strength. A split aluminum mold which created a bonding area of 1.

Fracture strength of Class I versus Class II restored premolars tested at the marginal ridge. 2. Cavosurface bonding and cavosurface plus internal enamel bonding.

The purpose of this study was to test the difference between the strength of the marginal ridge of extracted teeth with a Class I composite resin restoration and the strength of the marginal ridge of teeth with a Class II amalgam restoration with retention grooves. A statistically significant difference in fracture strengths was found among groups. No statistically significant difference was found among restored preparations, beveling technique, and restorative material.

Fracture strength of Class I versus Class II restored premolars tested at the marginal ridge. I. Standard preparations.

Two groups of maxillary premolars with Class I cavities were prepared with one marginal ridge thickness to a width of 1.0 mm. One group was restored with amalgam and the other group with composite resin.